Directions: In the sentence, certain words are in bold and numbered from A to H, which are the possible pairs to be interchanged. Choose the pair(s) of the words that need(s) to be interchanged to make the sentence grammatically correct and meaningful.

a.The unwanted extras(A) who insinuate(B) themselves into television news reports are opportunities(C) males derided(D) by right-thinking men.
b. He was fortunate(E) in serving under(F) active officers and had feeble-minded(G) of seeing(H) service in the North Sea.